<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" id="i1" placeholder="姓名">
<input type="text" id="i2" placeholder="工资">
<input type="text" id="i3" placeholder="工作">
<input type="button" value="添加" onclick="f()">
<table border="1">
    <tr>
        <th>姓名</th><th>工资</th><th>工作</th>
    </tr>
</table>

<script>
    //获取三个文本框,谷歌浏览器可省略这三句
// let i1 = document.querySelector("#i1")
// let i2 = document.querySelector("#i2")
// let i3 = document.querySelector("#i3")

    //通过标签名获取table query: 查询
    let table = document.querySelector("table");
function f(){

    //创建tr和td
    let tr = document.createElement("tr");
    let nameTd = document.createElement("td");
    let salaryTd = document.createElement("td");
    let jobTd = document.createElement("td");

    //把用户输入的内容添加到td里面
    nameTd.innerText = i1.value;
    salaryTd.innerText = i2.value;
    jobTd.innerText = i3.value;

    //把td装进tr中
    tr.append(nameTd,salaryTd,jobTd);
    //把tr装进table中
    table.append(tr);
}
</script>
</body>
</html>